def while_circle():
  s = ['今天','是','五月','六号']
  index = 0
  while index < len(s):
    element = s[index]
    print(element)
    index+=1

while_circle()

def for_circle():
  s = ['今天','是','五一','黄金周']
  for item in s:
    print(item)

for_circle()